Cash, Cash Equivalents and Short-term Investments - Cash, Cash Equivalents and Short-term Investments (Details) - USD ($) $ in Millions	Sep. 27, 2025	Jun. 28, 2025
Cash equivalents
Cash	$ 347.6	$ 349.5
Total cash and cash equivalents	772.9	520.7
Short-term investments:
Amortized Cost	348.1	356.0
Gross Unrealized Gains	0.9	0.5
Gross Unrealized Losses	(0.1)	(0.1)
Fair Value	348.9	356.4
Commercial paper
Short-term investments:
Amortized Cost	2.7	2.7
Gross Unrealized Gains	0.0	0.0
Gross Unrealized Losses	0.0	0.0
Fair Value	2.7	2.7
Corporate debt securities
Short-term investments:
Amortized Cost	205.1	210.9
Gross Unrealized Gains	0.6	0.3
Gross Unrealized Losses	(0.1)	(0.1)
Fair Value	205.6	211.1
U.S. Agency securities
Short-term investments:
Amortized Cost	77.1	67.6
Gross Unrealized Gains	0.1	0.1
Gross Unrealized Losses	0.0	0.0
Fair Value	77.2	67.7
U.S. Treasury securities
Short-term investments:
Amortized Cost	63.2	74.8
Gross Unrealized Gains	0.2	0.1
Gross Unrealized Losses	0.0	0.0
Fair Value	63.4	74.9
Money market funds
Cash equivalents
Cash equivalents:	125.6	161.7
U.S. Treasury securities
Cash equivalents
Cash equivalents:	$ 299.7
U.S. Agency securities
Cash equivalents
Cash equivalents:		7.0
Commercial paper
Cash equivalents
Cash equivalents:		$ 2.5